DE102020121821A1 - Method for controlling a vehicle driving mode and hybrid electric vehicle to improve MHSG efficiency - Google Patents

Method for controlling a vehicle driving mode and hybrid electric vehicle to improve MHSG efficiency Download PDF

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Publication number
DE102020121821A1
DE102020121821A1 DE102020121821.4A DE102020121821A DE102020121821A1 DE 102020121821 A1 DE102020121821 A1 DE 102020121821A1 DE 102020121821 A DE102020121821 A DE 102020121821A DE 102020121821 A1 DE102020121821 A1 DE 102020121821A1
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Germany
Prior art keywords
mode
cvt
speed
vehicle
electric motor
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Pending
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DE102020121821.4A
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German (de)
Inventor
Oh-Eun Kwon
Sun-Young Park
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Hyundai Motor Co
Kia Corp
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Hyundai Motor Co
Kia Motors Corp
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Publication of DE102020121821A1 publication Critical patent/DE102020121821A1/en
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/10—Controlling the power contribution of each of the prime movers to meet required power demand
    • B60W20/15—Control strategies specially adapted for achieving a particular effect
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/42—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by the architecture of the hybrid electric vehicle
    • B60K6/48—Parallel type
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W20/00—Control systems specially adapted for hybrid vehicles
    • B60W20/30—Control strategies involving selection of transmission gear ratio
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60W—CONJOINT CONTROL OF VEHICLE SUB-UNITS OF DIFFERENT TYPE OR DIFFERENT FUNCTION; CONTROL SYSTEMS SPECIALLY ADAPTED FOR HYBRID VEHICLES; ROAD VEHICLE DRIVE CONTROL SYSTEMS FOR PURPOSES NOT RELATED TO THE CONTROL OF A PARTICULAR SUB-UNIT
    • B60W30/00—Purposes of road vehicle drive control systems not related to the control of a particular sub-unit, e.g. of systems using conjoint control of vehicle sub-units
    • B60W30/18—Propelling the vehicle
    • B60W30/182—Selecting between different operative modes, e.g. comfort and performance modes
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    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
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    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
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    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/26—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the motors or the generators
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/28—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the electric energy storing means, e.g. batteries or capacitors
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
    • B60K6/36—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs characterised by the transmission gearings
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    • B60K—ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES; ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS IN VEHICLES; AUXILIARY DRIVES FOR VEHICLES; INSTRUMENTATION OR DASHBOARDS FOR VEHICLES; ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GAS EXHAUST OR FUEL SUPPLY OF PROPULSION UNITS IN VEHICLES
    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
    • B60K6/20—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs
    • B60K6/22—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00 the prime-movers consisting of electric motors and internal combustion engines, e.g. HEVs characterised by apparatus, components or means specially adapted for HEVs
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    • B60K6/00—Arrangement or mounting of plural diverse prime-movers for mutual or common propulsion, e.g. hybrid propulsion systems comprising electric motors and internal combustion engines ; Control systems therefor, i.e. systems controlling two or more prime movers, or controlling one of these prime movers and any of the transmission, drive or drive units Informative references: mechanical gearings with secondary electric drive F16H3/72; arrangements for handling mechanical energy structurally associated with the dynamo-electric machine H02K7/00; machines comprising structurally interrelated motor and generator parts H02K51/00; dynamo-electric machines not otherwise provided for in H02K see H02K99/00
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  • Engineering & Computer Science (AREA)
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  • Mechanical Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Automation & Control Theory (AREA)
  • Physics & Mathematics (AREA)
  • Mathematical Physics (AREA)
  • Hybrid Electric Vehicles (AREA)
  • Electric Propulsion And Braking For Vehicles (AREA)

Abstract

Verfahren zur Steuerung eines Fahrzeugfahrmodus eines Fahrzeuges, aufweisend Erfassen eines Moduswechsels, während ein Fahrzeug fährt, durch eine Modus-Steuereinrichtung (60) (S20), Ermitteln, ob der Moduswechsel von einem Elektrofahrzeug-Modus (EV-Modus) in einen Hybrid-Elektrofahrzeug-Modus (HEV-Modus) auftritt (S30), und wenn der Moduswechsel ermittelt wird, Durchführen einer Steuerung des Wechsels in einen mit einem stufenlosen Getriebe (CVT) (50) zusammenwirkenden Modus (S40-S90), bei welcher ein Elektromotor (20) des Fahrzeuges mit einem Verbrennungsmotor (10) durch Einrücken einer Kupplung (30) verbunden wird, während das CVT (50) betrieben wird.A method for controlling a vehicle travel mode of a vehicle, comprising detecting a mode change while a vehicle is traveling, by a mode controller (60) (S20), determining whether the mode change from an electric vehicle mode (EV mode) to a hybrid electric vehicle Mode (HEV mode) occurs (S30), and if the mode change is detected, performing control of changing to a continuously variable transmission (CVT) (50) cooperating mode (S40-S90) in which an electric motor (20 ) of the vehicle is connected to an internal combustion engine (10) by engaging a clutch (30) while the CVT (50) is operated.

Description

Die Erfindung betrifft eine Steuerung eines Fahrzeugfahrmodus eines 48V-P2-Systems, und insbesondere ein Hybrid-Elektrofahrzeug, welches eine Elektromotordrehzahl in einem Fahrzeuggeschwindigkeits-Haltezustand in Verbindung mit einem Übersetzungsverhältnis verringert, wenn ein Fahrmodus von einem Elektrofahrzeug(EV)-Modus in einen Hybrid-Elektrofahrzeug(HEV)-Modus gewechselt wird, um dadurch die Effizienz eines Mildhybrid-Startergenerators (MHSG) zu verbessern.The present invention relates to vehicle travel mode control of a 48V P2 system, and more particularly, to a hybrid electric vehicle that decreases an electric motor speed in a vehicle speed hold state in conjunction with a gear ratio when a travel mode is changed from an electric vehicle (EV) mode to a hybrid -Electric Vehicle (HEV) mode is changed to thereby improve the efficiency of a mild hybrid starter generator (MHSG).

Im Allgemeinen verwendet ein Mildhybrid-Elektrofahrzeug unter den Hybrid-Elektrofahrzeugen ein Mildhybrid-Startergenerator(MHSG)-System (typischerweise ein 48V-MHSG-System) eines MHSG, eine 48V-Batterie und einen Niederspannungs-DC/DC-Wandler (LDC) zusammen mit einem Benzin/Diesel-Verbrennungsmotor.In general, a mild hybrid electric vehicle among hybrid electric vehicles uses a mild hybrid starter generator (MHSG) system (typically a 48V MHSG system) of an MHSG, a 48V battery, and a low voltage DC / DC converter (LDC) together with a gasoline / diesel internal combustion engine.

Bei einem solchen Mildhybrid-Elektrofahrzeug sind der MHSG, der Verbrennungsmotor, eine Verbrennungsmotorkupplung, ein Elektromotor, ein stufenloses Getriebe (CVT) und ein Antriebssystem, welches das Starten und das Drehmoment des Verbrennungsmotors unterstützt, durch das 48V-P2-System charakterisiert. In diesem Falle ist der MHSG über einen Riemen, ein Zahnrad und dergleichen mit dem Verbrennungsmotor verbunden, um Leistung zu übertragen, und ist für das Starten des Verbrennungsmotors zuständig, wenn der Modus von einem Stoppzustand oder einem Elektrofahrzeug-Modus (EV-Modus) in einen Hybrid-Elektrofahrzeug-Modus (HEV-Modus) gewechselt wird.In such a mild hybrid electric vehicle, the MHSG, the internal combustion engine, an internal combustion engine clutch, an electric motor, a continuously variable transmission (CVT) and a drive system that supports the starting and torque of the internal combustion engine are characterized by the 48V P2 system. In this case, the MHSG is connected to the internal combustion engine via a belt, a gear and the like to transmit power and is responsible for starting the internal combustion engine when the mode is in from a stop state or an electric vehicle (EV) mode a hybrid electric vehicle mode (HEV mode) is switched.

Dementsprechend kann das 48V-P2-System die Verbrennungsmotorkupplung zwischen dem Verbrennungsmotor und dem Elektromotor steuern, um dadurch den EV-Modus und den HEV-Modus unabhängig zu realisieren, und kann insbesondere auch den Verbrennungsmotor und den Elektromotor in dem optimalen Punkt der größten Effizienz durch die Charakteristik des CVT, bei welchem das Übersetzungsverhältnis kontinuierlich geändert wird, antreiben.Accordingly, the 48V P2 system can control the engine clutch between the engine and the electric motor to thereby realize the EV mode and the HEV mode independently, and in particular, can also operate the engine and the electric motor at the optimum point of greatest efficiency drive the characteristic of the CVT in which the gear ratio is continuously changed.

Jedoch wurde festgestellt, dass das 48V-P2-System eine relativ lange Zeit für einen Moduswechsel von dem EV-Modus in den HEV-Modus benötigt, da der EV-Modus durch Erhöhen der Verbrennungsmotordrehzahl, bis die Verbrennungsmotordrehzahl mit der Elektromotordrehzahl synchronisiert ist, und anschließendes Einrücken der Verbrennungsmotorkupplung in den HEV-Modus gewechselt wird. Dementsprechend wirkt sich der Wechsel von dem EV-Modus in den HEV-Modus bei dem 48V-P2-System im Hinblick auf den Ladezustand (SOC) der Batterie und die Kraftstoffeffizienz nachteilig aus.However, it has been found that the 48V P2 system takes a relatively long time to change mode from EV mode to HEV mode, since EV mode is achieved by increasing the engine speed until the engine speed is synchronized with the electric motor speed and subsequent engagement of the engine clutch is changed to the HEV mode. Accordingly, changing from EV mode to HEV mode in the 48V P2 system is detrimental to the state of charge (SOC) of the battery and fuel efficiency.

Mit der Erfindung werden ein Verfahren zur Steuerung eines Fahrzeugfahrmodus und ein Hybrid-Elektrofahrzeug zur Verbesserung der MHSG-Effizienz geschaffen, welche, um die für einen MHSG gewünschte Leistung zu reduzieren, eine Elektromotordrehzahl in einem Zustand, in dem eine Fahrzeuggeschwindigkeit, wie sie ist, in Verbindung mit einem Übersetzungsverhältnis eines stufenlosen Getriebes (CVT) beibehalten wird, verringern können, wenn der Modus von einem EV-Modus in einen HEV-Modus gewechselt wird, um dadurch die MHSG-Effizienz eines 48V-P2-Systems zu verbessern, und insbesondere das Einrücken einer Verbrennungsmotorkupplung basierend auf dem Moduswechsel durch Reduzieren der Elektromotordrehzahl schnell durchführen können, um die für den Moduswechsel gewünschte Zeit zu reduzieren, so dass dies eine Verbesserung im Hinblick auf den SOC einer Batterie und die Kraftstoffeffizienz ist.The invention provides a method for controlling a vehicle running mode and a hybrid electric vehicle for improving the MHSG efficiency, which, in order to reduce the output desired for an MHSG, an electric motor speed in a state in which a vehicle speed is as it is, in conjunction with a continuously variable transmission (CVT) gear ratio, when the mode is changed from an EV mode to an HEV mode, thereby improving the MHSG efficiency of a 48V P2 system, and in particular can quickly perform the engagement of an engine clutch based on the mode change by reducing the electric motor speed to reduce the time required for the mode change, so that it is an improvement in terms of SOC of a battery and fuel efficiency.

Gemäß der Erfindung weist ein Verfahren zur Steuerung eines Fahrzeugfahrmodus auf: Erfassen eines Moduswechsels (bzw. einer Modusumschaltung), während ein Fahrzeug fährt, durch eine Modus-Steuereinrichtung, Ermitteln (bzw. Bestimmen), ob der Moduswechsel von einem Elektrofahrzeug-Modus (EV-Modus) in einen Hybrid-Elektrofahrzeug-Modus (HEV-Modus) auftritt, durch die Modus-Steuereinrichtung, und wenn der Moduswechsel ermittelt wird, Durchführen einer Steuerung des Wechsels in einen mit einem CVT (stufenlosen bzw. kontinuierlich variablen Getriebe) zusammenwirkenden Modus, bei welcher der Moduswechsel von einem EV-Modus in einen HEV-Modus bestätigt wird, ein Elektromotor (bzw. ein Antriebsmotor) mit einem Verbrennungsmotor durch Einrücken einer Kupplung mittels eines Betriebs des CVT verbunden wird, eine Elektromotordrehzahl (U/min) des Elektromotors durch den Betrieb des CVT verringert wird, und die Elektromotordrehzahl mit der Verbrennungsmotordrehzahl synchronisiert wird, durch die Modus-Steuereinrichtung.According to the invention, a method for controlling a vehicle driving mode comprises: detecting a mode change (or a mode changeover) while a vehicle is driving by a mode control device, ascertaining (or determining) whether the mode change from an electric vehicle mode (EV Mode) in a hybrid electric vehicle mode (HEV mode) occurs by the mode controller, and when the mode change is detected, performing control of the change in a CVT (continuously variable transmission) cooperating mode , in which the mode change from an EV mode to an HEV mode is confirmed, an electric motor (or a drive motor) is connected to an internal combustion engine by engaging a clutch through operation of the CVT, an electric motor speed (rpm) of the electric motor is reduced by the operation of the CVT, and the electric motor speed is synchronized with the internal combustion engine speed, through the Mod us control device.

In einer Ausführungsform der Erfindung wird der Betrieb des CVT in einem CVT-Übersetzungsverhältnis-Steuerungszustand, in dem eine Fahrzeuggeschwindigkeit gehalten wird, in einem Moduswechselbereich des EV-Modus und des HEV-Modus durchgeführt und in dem Endzeitpunkt des EV-Modus gestartet.In an embodiment of the invention, the operation of the CVT in a CVT speed ratio control state in which a vehicle speed is maintained is performed in a mode switching area of the EV mode and the HEV mode, and is started in the end timing of the EV mode.

In einer anderen Ausführungsform wird die Steuerung des Wechsels in den mit dem CVT zusammenwirkenden Modus als Eintreten in den Moduswechsel durch Bestätigen des Wechsels von dem EV-Modus in den HEV-Modus, Durchführen einer Steuerung eines CVT-Übersetzungsverhältnisses durch Betreiben des CVT, Antreiben des Verbrennungsmotors, und Durchführen einer Kupplungseinrückung durch Steuern der Kupplung, um den Verbrennungsmotor und den Elektromotor miteinander zu verbinden, durchgeführt.In another embodiment, the control of changing to the CVT cooperative mode is performed as entering the mode change by confirming the change from the EV mode to the HEV mode, performing control of a CVT speed ratio by operating the CVT, driving the Internal combustion engine, and performing clutch engagement by controlling the clutch to to connect the internal combustion engine and the electric motor together, performed.

In einer anderen Ausführungsform wird die CVT-Übersetzungsverhältnis-Steuerung in ein Nichtbetreiben des CVT, welches eine OOL (Optimalbetriebslinie) von einem Schaltliniendiagramm ausschließt, so dass die CVT-Steuerung nicht durchgeführt wird, und ein Betreiben des CVT unterteilt wird, welches die CVT-Steuerung durchführt.In another embodiment, the CVT speed ratio control is divided into not operating the CVT, which excludes an OOL (Optimal Operation Line) from a shift line diagram so that the CVT control is not performed, and operating the CVT, which controls the CVT. Control performs.

In einigen Ausführungsformen der Erfindung treibt das Nichtbetreiben des CVT den Verbrennungsmotor durch Ausschließen der OOL an, und das Betreiben des CVT ist ein CVT-Heraufschalten, welches durch einen Schongang (bzw. Overdrive OD) für das Heraufschalten des CVT-Übersetzungsverhältnisses durchgeführt wird.In some embodiments of the invention, not operating the CVT powers the internal combustion engine by excluding the OOL, and operating the CVT is a CVT upshift performed by overdrive OD for the CVT gear ratio upshift.

In einigen Ausführungsformen der Erfindung wird eine Verbrennungsmotordrehzahl (U/min) erhöht, bis die Verbrennungsmotordrehzahl die Elektromotordrehzahl erreicht, um einen Synchronisationszustand zu erlangen.In some embodiments of the invention, an engine speed (RPM) is increased until the engine speed reaches the electric motor speed to achieve a synchronization state.

Außerdem weist ein Hybrid-Elektrofahrzeug gemäß der Erfindung zum Erreichen des Zieles eine Modus-Steuereinrichtung auf, welche eine Kupplung, nachdem eine Elektromotordrehzahl (U/min) eines Elektromotors (bzw. eines Antriebsmotors) mit einer Verbrennungsmotordrehzahl (U/min) synchronisiert ist, in einem Zustand einrückt, in dem die Elektromotordrehzahl des Elektromotors relativ zu einem EV-Modus unter einer Steuerung des Übersetzungsverhältnisses eines CVT (stufenlosen oder kontinuierlich variablen Getriebes) verringert (oder herabgesetzt) wird, wenn ein Modus von dem EV(Elektrofahrzeug)-Modus in einen HEV(Hybrid-Elektrofahrzeug)-Modus gewechselt (bzw. umgeschaltet) wird, während ein Fahrzeug in dem EV-Modus fährt.In addition, a hybrid electric vehicle according to the invention has, in order to achieve the objective, a mode control device which engages a clutch after an electric motor speed (rpm) of an electric motor (or a drive motor) is synchronized with an internal combustion engine speed (rpm), engages in a state in which the electric motor speed of the electric motor is decreased (or decreased) relative to an EV mode under control of the gear ratio of a CVT (continuously variable transmission) when a mode is changed from the EV (electric vehicle) mode in an HEV (Hybrid Electric Vehicle) mode is changed (or switched) while a vehicle is running in the EV mode.

In einigen Ausführungsformen der Erfindung führt die Modus-Steuereinrichtung das Heraufschalten durch einen OD (Schongang bzw. overdrive) durch, welches in dem Endzeitpunkt des EV-Modus gestartet wird, so dass eine Fahrzeuggeschwindigkeit in einem CVT-Übersetzungsverhältnis-Steuerungszustand gehalten wird.In some embodiments of the invention, the mode controller performs the upshift by an OD (overdrive) started in the end timing of the EV mode so that a vehicle speed is kept in a CVT speed ratio control state.

In einer anderen Ausführungsform betreibt die Modus-Steuereinrichtung die CVT-Steuerung nicht in einem Schaltliniendiagramm einer OOL (Optimalbetriebslinie).In another embodiment, the mode controller does not operate the CVT control in a shift line diagram of an OOL (Optimal Operation Line).

In einer anderen Ausführungsform rückt der Moduswechsel die Kupplung in einem Zustand ein, in dem die Elektromotordrehzahl des Elektromotors verringert ist, so dass der SOC (Ladezustand) einer Batterie und die Kraftstoffeffizienz durch die für den Moduswechsel gewünschte Zeit verbessert werden.In another embodiment, the mode change engages the clutch in a state where the electric motor speed of the electric motor is decreased so that the SOC (State of Charge) of a battery and fuel efficiency are improved by the time desired for the mode change.

In einigen Ausführungsformen der Erfindung ist der Elektromotor (Antriebsmotor) zwischen dem Verbrennungsmotor und dem CVT angebracht, um ein 48V-P2-System zu konfigurieren, in welchem ein MHSG-System mit dem Verbrennungsmotor verbunden ist, und die MHSG-Effizienz des MHSG-Systems wird durch das Niveau verbessert, bei welchem die Elektromotordrehzahl des Elektromotors in einem Zustand, in dem eine Fahrzeuggeschwindigkeit gehalten wird, auf den Moduswechsel verringert wird.In some embodiments of the invention, the electric motor (drive motor) is placed between the internal combustion engine and the CVT to configure a 48V P2 system in which an MHSG system is connected to the internal combustion engine and the MHSG efficiency of the MHSG system is improved by the level at which the electric motor speed of the electric motor in a state where a vehicle speed is maintained is decreased to the mode change.

Die Steuerung des Fahrzeugfahrmodus zur Verbesserung der MHSG-Effizienz, welche bei dem Hybrid-Elektrofahrzeug gemäß der vorliegenden Erfindung verwendet wird, realisiert die folgenden Funktionen und Effekte.The vehicle running mode control for improving MHSG efficiency, which is used in the hybrid electric vehicle according to the present invention, realizes the following functions and effects.

Ersten ist es möglich, die MHSG-Effizienz des 48V-P2-System-Fahrzeuges unter den Hybrid-Elektrofahrzeugen in Verbindung mit dem CVT bei dem Fahrmoduswechsel zu verbessern. Zweitens kann die MHSG-Effizienz durch Verringerung (oder Herabsetzung) lediglich der Elektromotordrehzahl (oder der Elektromotorgeschwindigkeit) ohne Änderung der Fahrzeuggeschwindigkeit unter einer Steuerung des Übersetzungsverhältnisses des CVT verbessert werden, um dadurch den Effekt der Erhöhung der Kraftstoffeffizienz relativ zu dem gesamten Pfad durch Reduzieren der für den MHSG gewünschten Leistung zu erwarten. Drittens ist es möglich, die Verbrennungsmotordrehzahl und die Elektromotordrehzahl durch Reduzieren der Elektromotordrehzahl schneller zu synchronisieren, um dadurch die für den Moduswechsel gewünschte Zeit zu reduzieren. Viertens ist es möglich, die Verbrennungsmotorkupplung durch Reduzieren der für den Moduswechsel gewünschten Zeit schnell einzurücken, um dadurch die Aspekte des SOC der Batterie und der Kraftstoffeffizienz zu verbessern.First, it is possible to improve the MHSG efficiency of the 48V P2 system vehicle among the hybrid electric vehicles in connection with the CVT when changing the driving mode. Second, the MHSG efficiency can be improved by reducing (or decreasing) only the electric motor speed (or the electric motor speed) without changing the vehicle speed under control of the gear ratio of the CVT, thereby having the effect of increasing the fuel efficiency relative to the entire path by reducing the expected performance for the MHSG. Third, it is possible to synchronize the engine speed and the electric motor speed more quickly by reducing the electric motor speed, thereby reducing the time required for the mode change. Fourth, it is possible to quickly engage the engine clutch by reducing the time desired for the mode change, thereby improving the aspects of the battery SOC and fuel efficiency.

Weitere Bereiche der Anwendbarkeit sind aus der hierin vorgesehenen Beschreibung ersichtlich. Es versteht sich, dass die Beschreibung und die speziellen Beispiele lediglich für Zwecke der Erläuterung und nicht dazu bestimmt sind, den Bereich der Erfindung zu beschränken.Further areas of applicability are apparent from the description provided herein. It is to be understood that the description and specific examples are intended for purposes of illustration only and are not intended to limit the scope of the invention.

Die Erfindung wird mit Bezug auf die Zeichnung näher erläutert. In der Zeichnung zeigen:

  • 1 ein Flussdiagramm, das ein Verfahren zur Steuerung eines Fahrmodus zur Verbesserung der MHSG-Effizienz gemäß einer Ausführungsform der Erfindung darstellt;
  • 2 ein Diagramm, das ein Beispiel eines Hybrid-Elektrofahrzeuges, welches ein 48V-P2-System verwendet, das geeignet ist, die MHSG-Effizienz unter einer Steuerung des Fahrmodus zu verbessern, gemäß einer Ausführungsform der Erfindung darstellt; und
  • 3 ein Diagramm, das einen Betriebszustand des 48V-P2-Systems, welches einen Modus von einem EV-Modus in einen HEV-Modus wechselt, gemäß einer Ausführungsform der Erfindung darstellt.
The invention is explained in more detail with reference to the drawing. In the drawing show:
  • 1 a flowchart illustrating a method of controlling a drive mode to improve MHSG efficiency according to an embodiment of the invention;
  • 2 FIG. 13 is a diagram illustrating an example of a hybrid electric vehicle using a 48V P2 system capable of improving MHSG efficiency under control of the driving mode according to an embodiment of the invention; and
  • 3 FIG. 13 is a diagram illustrating an operating state of the 48V P2 system changing a mode from an EV mode to an HEV mode, according to an embodiment of the invention.

Die hierin beschriebenen Zeichnungen sind nur für Erläuterungszwecke und nicht dazu bestimmt, den Bereich der Erfindung in irgendeiner Weise zu beschränken.The drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way.

Die folgende Beschreibung ist lediglich beispielhafter Natur und nicht dazu bestimmt, die Offenbarung, Anmeldung oder Verwendungen zu beschränken. Es versteht sich, dass durch die Zeichnungen hinweg korrespondierende Bezugszeichen gleiche oder korrespondierende Teile und Merkmale bezeichnen.The following description is merely exemplary in nature and is in no way intended to limit the disclosure, application, or uses. It goes without saying that throughout the drawings, corresponding reference symbols denote the same or corresponding parts and features.

Mit Bezug auf 1 verbessert ein Verfahren zur Steuerung eines Fahrzeugfahrmodus die Effizienz eines Mildhybrid-Startergenerators (MHSG) unter einer Steuerung des Wechsels in einen mit einem stufenlosen Getriebe (CVT) zusammenwirkenden Modus (S40 bis S90), welche einen Fahrmodus durch Betreiben des CVT, bevor eine Kupplung eingerückt wird, beim Bestätigen von Fahrzeugfahrmodus-Wechselbedingungen wechselt (S10 bis S30), welche von einem EV-Modus, in welchem ein Elektromotor ein Fahrzeug antreibt, in einen HEV-Modus, in welchem ein Verbrennungsmotor das Fahrzeug antreibt, gewechselt werden.Regarding 1 A method for controlling a vehicle driving mode improves the efficiency of a mild hybrid starter generator (MHSG) under a control of the change in a mode cooperating with a continuously variable transmission (CVT) ( S40 until S90 ), which changes a driving mode by operating the CVT before a clutch is engaged upon confirmation of vehicle driving mode switching conditions (S10 to S30), which changes from an EV mode in which an electric motor drives a vehicle to an HEV mode, in which an internal combustion engine drives the vehicle, can be changed.

Insbesondere schaltet die Steuerung des Wechsels in den mit dem CVT zusammenwirkenden Modus (S40 bis S90) zwangsläufig ein CVT-Übersetzungsverhältnis durch einen Schongang (Overdrive OD) herauf, während eine Steuerung des Übersetzungsverhältnisses basierend auf einer Optimalbetriebslinie (OOL) ausgeschlossen wird, so dass die Kupplung eingerückt wird, nachdem die Verbrennungsmotordrehzahl erhöht ist, bis die Verbrennungsmotordrehzahl mit der Elektromotordrehzahl synchronisiert ist.In particular, the control of the change switches to the mode interacting with the CVT ( S40 until S90 ) inevitably up a CVT gear ratio through overdrive OD, while precluding control of the gear ratio based on an optimal operating line (OOL) so that the clutch is engaged after the engine speed is increased until the engine speed synchronizes with the electric motor speed is.

Dementsprechend kann das Verfahren zur Steuerung des Fahrzeugfahrmodus die Drehzahl des Elektromotors in einem Zustand, in dem die Fahrzeuggeschwindigkeit gehalten wird, durch Steuerung des CVT-Übersetzungsverhältnisses basierend auf dem Heraufschalten in den OD verringern, wenn der Modus von dem EV-Modus in den HEV-Modus gewechselt wird, wodurch es im Gegensatz zu einem herkömmlichen Verfahren zum Wechseln des EV-Modus in den HEV-Modus als ein Verfahren zur Steuerung eines Fahrzeugfahrmodus zur Verbesserung der MHSG-Effizienz charakterisiert ist.Accordingly, the method of controlling the vehicle running mode can reduce the speed of the electric motor in a state where the vehicle speed is maintained by controlling the CVT gear ratio based on the upshift to the OD when the mode is changed from the EV mode to the HEV mode. Mode is changed, thereby characterizing it as a method of controlling a vehicle driving mode to improve MHSG efficiency, unlike a conventional method of changing the EV mode to the HEV mode.

Daher kann das Verfahren zur Steuerung des Fahrzeugfahrmodus zur Verbesserung der MHSG-Effizienz nur die Drehzahl des Elektromotors in einem Zustand verringern, in dem die Fahrzeuggeschwindigkeit gehalten wird, um dadurch den Effekt des Reduzierens der Verbrennungsmotordrehzahl zum Einrücken der Verbrennungsmotorkupplung zu realisieren, und infolgedessen kann der Effekt die für den MHSG gewünschte Leistung reduzieren, so dass die Verbrennungsmotorkupplung schnell eingerückt wird, wodurch die für den Moduswechsel gewünschte Zeit durch das reduzierte Leistungsniveau reduziert wird und dies auch im Hinblick auf den SOC und die Kraftstoffeffizienz vorteilhaft ist.Therefore, the method of controlling the vehicle running mode to improve the MHSG efficiency can only reduce the speed of the electric motor in a state in which the vehicle speed is maintained, thereby realizing the effect of reducing the engine speed to engage the engine clutch, and as a result, the Effect reduce the power required for the MHSG, so that the engine clutch is engaged quickly, whereby the time required for the mode change is reduced by the reduced power level and this is also advantageous in terms of SOC and fuel efficiency.

Indessen zeigt 2 ein Beispiel eines Hybrid-Elektrofahrzeuges 1, das ein Mildhybrid-Elektrofahrzeug ist, welches ein 48V-P2-System 1-1 verwendet, bei welchem ein Elektromotor 20 zwischen einem Verbrennungsmotor 10 und einem CVT 50 angebracht ist, während der Verbrennungsmotor 10 mit einem MHSG-System verbunden ist. Jedoch kann das Hybrid-Elektrofahrzeug 1 ein Mildhybrid-Elektrofahrzeug von einem P0-Typ, einem P3-Typ oder einem P4-Typ sein, bei welchen der Elektromotor 20 durch einen Riemen mit einer Verbrennungsmotorriemenscheibe des Verbrennungsmotors 10 verbunden ist, an dem CVT 50 montiert ist bzw. an Rädern montiert ist.Meanwhile shows 2 an example of a hybrid electric vehicle 1 , which is a mild hybrid electric vehicle using a 48V P2 system 1-1 in which an electric motor 20th between an internal combustion engine 10 and a CVT 50 attached while the internal combustion engine 10 is connected to an MHSG system. However, the hybrid electric vehicle can 1 be a mild hybrid electric vehicle of a P0-type, a P3-type or a P4-type in which the electric motor 20th by a belt with an internal combustion engine pulley of the internal combustion engine 10 connected to the CVT 50 is mounted or is mounted on wheels.

Zum Beispiel weist das 48V-P2-System 1-1 einen Verbrennungsmotor 10, einen Elektromotor (Antriebselektromotor) 20, eine Kupplung 30, die derart konfiguriert ist, dass sie den Verbrennungsmotor 10 mit dem Elektromotor 20 verbindet, einen Mildhybrid-Startergenerator (MHSG) 40, welcher das Starten und das Drehmoment des Verbrennungsmotors unterstützt, Primär/Sekundär-Riemenscheiben, welche mit einer Antriebswelle verbunden sind, ein CVT 50 und eine Modus-Steuereinrichtung 60 auf, welche eine Schaltstufe durch Übertragen von Leistung an den Riemen wechselt.For example, the 48V P2 system 1-1 includes an internal combustion engine 10 , an electric motor (drive electric motor) 20th , a clutch 30th that is configured to run the internal combustion engine 10 with the electric motor 20th connects, a mild hybrid starter generator (MHSG) 40 , which supports the starting and the torque of the internal combustion engine, primary / secondary pulleys which are connected to a drive shaft, a CVT 50 and a mode controller 60 which changes a gear stage by transmitting power to the belt.

Speziell speichert die Modus-Steuereinrichtung 60 ein Programm oder einen Algorithmus für die Steuerung des Wechsels in den mit dem CVT zusammenwirkenden Modus (S40 bis S90) in einen Speicher und arbeitet als eine Zentrale Verarbeitungseinheit (CPU), welche das Programm oder den Algorithmus ausführt. Zu diesem Zweck weist die Modus-Steuereinrichtung 60 einen Datenprozessor 61 und ein Schaltkennfeld 63 auf. Als Eingabedaten stellt der Datenprozessor 61 die Modus-Steuereinrichtung 60 mit einer Verbrennungsmotor/ Elektromotor/Kupplungs-Drehzahl, einer Fahrzeuggeschwindigkeit, einem SOC, einer CVT-Schaltstufe, einem Verbrennungsmotor/Elektromotor/Kupplungs-EIN/AUS und einem EV/HEV-Modus bereit, und das Schaltkennfeld 63 stellt die Modus-Steuereinrichtung 60 mit einem Elektromotor/Verbrennungsmotor-CVT-Schaltliniendiagramm bereit, welches eine Optimalbetriebslinie (OOL) aufweist.Specifically, the mode controller stores 60 a program or an algorithm for controlling the change to the mode interacting with the CVT ( S40 until S90 ) into a memory and works as a central processing unit (CPU) which executes the program or the algorithm. To this end, the mode controller 60 a data processor 61 and a shift map 63 on. The data processor provides 61 the mode controller 60 with an engine / electric motor / clutch speed, a vehicle speed, an SOC, a CVT shift stage, an engine / electric motor / clutch ON / OFF and an EV / HEV mode, and the shift map 63 represents the mode controller 60 with an electric motor / engine CVT shift line diagram that has a Optimal Operating Line (OOL).

Nachfolgend wird das Verfahren zur Steuerung des Fahrzeugfahrmodus zur Verbesserung der MHSG-Effizienz aus 1 mit Bezug auf die 2 und 3 ausführlich beschrieben. In diesem Falle wird beschrieben, dass der Steuerungsgegenstand die Modus-Steuereinrichtung 60 ist, und das Steuerungsziel ist der Verbrennungsmotor 10, der Elektromotor 20, die Kupplung 30 und das CVT 50 oder die Kupplung 30 und das CVT 50 des 48V-P2-Systems 1-1.The following is the method for controlling the vehicle drive mode to improve MHSG efficiency 1 with reference to the 2 and 3 described in detail. In this case, it is described that the object of control is the mode controller 60 and the control target is the internal combustion engine 10 , the electric motor 20th , the coupling 30th and the CVT 50 or the clutch 30th and the CVT 50 of the 48V P2 system 1-1.

Zuerst führt die Modus-Steuereinrichtung 60 das Bestätigen der Fahrzeugfahrmodus-Wechselbedingungen (S10 bis S30) als Erfassen von Fahrzeuginformationen (S10), Erfassen eines Fahrzeugfahrmodus (S20) und Ermitteln eines Moduswechsels (S30) durch.First, the mode controller performs 60 confirming the vehicle driving mode switching conditions ( S10 until S30 ) as capturing vehicle information ( S10 ), Detecting a vehicle driving mode ( S20 ) and determining a mode change ( S30 ) by.

Mit Bezug auf 2 führt die Modus-Steuereinrichtung 60 das Erfassen der Fahrzeuginformationen (S10) durch Lesen der Verbrennungsmotor/Elektromotor/ Kupplungs-Drehzahl, der Fahrzeuggeschwindigkeit, des SOC, der CVT-Schaltstufe, des Verbrennungsmotor/Elektromotor/Kupplungs-EIN/AUS und des EV/HEV-Modus des Datenprozessors 61 als Eingabedaten durch.Regarding 2 runs the mode controller 60 the acquisition of vehicle information ( S10 ) by reading the engine / electric motor / clutch RPM, vehicle speed, SOC, CVT speed, engine / electric motor / clutch ON / OFF and EV / HEV mode of the data processor 61 as input data.

Anschließend führt die Modus-Steuereinrichtung 60 das Erfassen des Fahrzeugfahrmodus (S20) durch Ändern der Fahrzeuggeschwindigkeit, des SOC, der Elektromotordrehzahl, des EV-Modus und dergleichen unter den Eingabedaten durch und führt dementsprechend das Ermitteln des Moduswechsels (S30) durch Bestätigen des Wechsels von dem EV-Modus in den HEV-Modus durch.The mode controller then performs 60 the detection of the vehicle driving mode ( S20 ) by changing the vehicle speed, the SOC, the electric motor speed, the EV mode and the like among the input data, and accordingly executes the determination of the mode change ( S30 ) by confirming the change from EV mode to HEV mode.

Danach führt die Modus-Steuereinrichtung 60 die Steuerung des Wechsels in den mit dem CVT zusammenwirkenden Modus (S40 bis S90) als Bestätigen eines Moduswechsel-Fahrzeugzustands (S40), Eintreten in den Moduswechsel (S50), Steuern eines CVT-Übersetzungsverhältnisses (S60), Antreiben eines Verbrennungsmotors (Verbrennungsmotor EIN) (S70), Ermitteln eines Verbrennungsmotor/Elektromotor-Drehzahl-Synchronisationszustands (S80) und Steuern einer Kupplungseinrückung (S90) durch.Thereafter, the mode controller performs 60 the control of the change in the mode interacting with the CVT ( S40 until S90 ) as confirmation of a mode change vehicle state ( S40 ), Entering the mode change ( S50 ), Controlling a CVT gear ratio ( S60 ), Driving an internal combustion engine (internal combustion engine ON) ( S70 ), Determining an internal combustion engine / electric motor speed synchronization state ( S80 ) and controlling a clutch engagement ( S90 ) by.

Mit Bezug auf 2 führt die Modus-Steuereinrichtung 60 das Bestätigen des Moduswechsel-Fahrzeugzustands (S40) durch Bestätigen der Fahrzeuggeschwindigkeit, der Elektromotordrehzahl, der Verbrennungsmotordrehzahl, der CVT-Schaltstufe und dergleichen unter den Eingabedaten durch. Anschließend führt die Modus-Steuereinrichtung 60 das Eintreten in den Moduswechsel (S50) durch Wechseln eines EV-Modus-Steuerungszustands in einen HEV-Modus-Steuerungszustand durch.Regarding 2 runs the mode controller 60 confirming the mode change vehicle status ( S40 ) by confirming the vehicle speed, the electric motor speed, the engine speed, the CVT speed and the like among the input data. The mode controller then performs 60 entering the mode change ( S50 ) by changing an EV mode control state to an HEV mode control state.

Speziell führt die Modus-Steuereinrichtung 60 das Steuern des CVT-Übersetzungsverhältnisses (S60) als Bestätigen eines OOL-Schaltliniendiagramms (S61) und Bestätigen eines CVT-Heraufschaltens (S62) durch. Zum Beispiel ist das Bestätigen des OOL-Schaltliniendiagramms (S61) zum Beibehalten eines Effektes des Optimierungsliniendiagramms des Verbrennungsmotors 10 und des Elektromotors 20. Dementsprechend wechselt die Modus-Steuereinrichtung 60 den Prozess in das Antreiben des Verbrennungsmotors (Verbrennungsmotor EIN) ohne Übersetzungsverhältnissteuerung des CVT 50 in der Optimalbetriebslinie (OOL) des Verbrennungsmotors 10 und des Elektromotors 20, wenn der EV-Modus in den HEV-Modus gewechselt wird, während das Fahrzeug in dem EV-Modus fährt.Specifically, the mode controller performs 60 controlling the CVT gear ratio ( S60 ) as confirmation of an OOL circuit diagram ( S61 ) and confirming a CVT upshift ( S62 ) by. For example, confirming the OOL circuit diagram ( S61 ) for maintaining an effect of the optimization line diagram of the internal combustion engine 10 and the electric motor 20th . The mode controller changes accordingly 60 the process into driving the engine (engine ON) without speed ratio control of the CVT 50 in the optimal operating line (OOL) of the internal combustion engine 10 and the electric motor 20th when the EV mode is switched to the HEV mode while the vehicle is running in the EV mode.

Andererseits bringt das Durchführen des CVT-Heraufschaltens (S62) das Übersetzungsverhältnis des CVT in einen zwangsläufigen Heraufschaltzustand durch einen Schongang unter einer zwangsweisen Übersetzungsverhältnis-Steuerung, wenn der EV-Modus in den HEV-Modus gewechselt wird, während das Hybrid-Elektrofahrzeug 1 in dem EV-Modus fährt. Dementsprechend kann, um die für das Einrücken der Kupplung 30 gewünschte Verbrennungsmotordrehzahl zu verringern, die Modus-Steuereinrichtung 60 das CVT-Übersetzungsverhältnis steuern, um die Elektromotordrehzahl des Elektromotors 20 in einem Zustand zu verringern, in dem die Geschwindigkeit des Hybrid-Elektrofahrzeuges 1 gehalten wird, wie sie ist, wodurch die für den MHSG 40 gewünschte Leistung reduziert wird.On the other hand, performing the CVT upshift ( S62 ) the gear ratio of the CVT in a positive upshift state by overdrive under positive speed ratio control when the EV mode is changed to the HEV mode while the hybrid electric vehicle 1 drives in the EV mode. Accordingly, in order to ensure that the clutch is engaged 30th to reduce the desired engine speed, the mode control device 60 control the CVT gear ratio to the electric motor speed of the electric motor 20th to decrease in a state in which the speed of the hybrid electric vehicle 1 is kept as it is, which makes the MHSG 40 desired power is reduced.

Zum Beispiel wechselt das Antreiben des Verbrennungsmotors (S70) den Verbrennungsmotor 10, welcher in dem EV-Modus im Stoppzustand (Verbrennungsmotor AUS) ist, in den Antriebszustand (Verbrennungsmotor EIN).For example, the drive of the internal combustion engine changes ( S70 ) the internal combustion engine 10 , which is in the stop state (engine OFF) in the EV mode, to the drive state (engine ON).

Mit Bezug auf 3 ist das Durchführen des CVT-Heraufschaltens (S62) durch die Modus-Steuereinrichtung 60 dargestellt. Wie gezeigt, liest die Modus-Steuereinrichtung 60 das Schaltkennfeld 63, um das CVT-Schaltliniendiagramm für die HEV-Modus-Steuerung zu bestätigen, und startet die CVT-Übersetzungsverhältnis-Steuerung (S60) in einem Moduswechselbereich des EV-Modus und des HEV-Modus.Regarding 3 is performing the CVT upshift ( S62 ) by the mode controller 60 shown. As shown, the mode controller reads 60 the shift map 63 to confirm the CVT shift line diagram for HEV mode control, and start CVT speed ratio control ( S60 ) in a mode switching area of the EV mode and the HEV mode.

Anschließend schaltet die Modus-Steuereinrichtung 60 zwangsläufig das Übersetzungsverhältnis des CVT durch den Schongang beim Durchführen des CVT-Heraufschaltens (S62) herauf, ohne in der OOL-Bedingung beim Bestätigen des OOL-Schaltliniendiagramms (S61) zu sein. In einer Ausführungsform verwendet der Schongang etwa 2.000 U/min. In diesem Falle startet der CVT-Betrieb durch das Durchführen des CVT-Heraufschaltens (S62) in dem Endzeitpunkt des EV-Modus, wo der EV-Modus in den HEV-Modus gewechselt wird, und wird daher in dem Moduswechselbereich durchgeführt. Daher bedeutet der Endzeitpunkt des EV-Modus ein Startzeitpunkt des CVT-Betriebs in einem Moduswechselbereich des EV-Modus und des HEV-Modus.The mode control device then switches 60 inevitably the transmission ratio of the CVT due to the overdrive gear when performing the CVT upshift ( S62 ) without in the OOL condition when confirming the OOL circuit diagram ( S61 ) to be. In one embodiment, overdrive uses about 2,000 RPM. In this case, the CVT operation starts by performing the CVT upshift ( S62 ) at the end time of the EV mode where the EV mode is changed to the HEV mode, and is therefore performed in the mode change area. Therefore, the end timing of the EV mode means a start timing of the CVT operation in a mode switching area of the EV mode and the HEV mode.

Dann verringert, wie in dem Moduswechselbereich, der Elektromotor 20 die Elektromotordrehzahl des EV-Modus durch das zwangsläufige CVT-Heraufschalten, während der Verbrennungsmotor 10 die Verbrennungsmotordrehzahl durch Antreiben des Verbrennungsmotors 10 erhöht, wodurch ein Elektromotor-Verbrennungsmotor-Drehzahl-Kontaktbereich schnell gebildet wird. In diesem Falle bedeutet der Elektromotor-Verbrennungsmotor-Drehzahl-Kontaktbereich ein Bereich, welcher den Kontakt der Kupplung 30 ermöglicht.Then, as in the mode change area, the electric motor decreases 20th the electric motor speed of the EV mode by the positive CVT upshift while the engine is running 10 the engine speed by driving the engine 10 is increased, thereby quickly forming an electric motor-engine speed contact area. In this case, the electric motor-internal combustion engine speed contact area means an area which is the contact of the clutch 30th enables.

Zurück mit Bezug auf 2 erhöht die Modus-Steuereinrichtung 60 die Verbrennungsmotordrehzahl des Verbrennungsmotors 10, bis die Verbrennungsmotordrehzahl des Verbrennungsmotors 10 die Elektromotordrehzahl des Elektromotors 20 erreicht, und steuert dann die Kupplung 30 derart, dass der Verbrennungsmotor 10 und der Elektromotor 20 miteinander verbunden sind.Back with reference to 2 increases the mode controller 60 the internal combustion engine speed of the internal combustion engine 10 until the engine speed of the engine 10 the electric motor speed of the electric motor 20th and then controls the clutch 30th such that the internal combustion engine 10 and the electric motor 20th are connected to each other.

Dementsprechend wird das Ermitteln des Verbrennungsmotor/ Elektromotor-Drehzahl-Synchronisationszustands (S80) durch die Verbrennungsmotordrehzahl des Verbrennungsmotors 10 durchgeführt, die den Elektromotor-Verbrennungsmotor-Drehzahl-Kontaktbereich nach einer Wartezeit (S80-1) erreicht, und das Steuern der Kupplungseinrückung (S90) wird durchgeführt, während die Verbrennungsmotordrehzahl und die Elektromotordrehzahl zusammengepasst werden, um dadurch die Synchronisation zwischen dem Verbrennungsmotor 10 und dem Elektromotor 20 ohne Kupplung OFFEN/SCHLUPF zu realisieren.Accordingly, the determination of the internal combustion engine / electric motor speed synchronization state ( S80 ) by the internal combustion engine speed of the internal combustion engine 10 carried out, which the electric motor-combustion engine-speed-contact area after a waiting time ( S80-1 ) and controlling the clutch engagement ( S90 ) is performed while the engine speed and the electric motor speed are matched to thereby synchronize the engine 10 and the electric motor 20th to be realized without clutch OPEN / SLIP.

Schließlich steuert die Modus-Steuereinrichtung 60 das Hybrid-Elektrofahrzeug 1 durch Setzen des Fahrmodus in den HEV-Modus.Finally, the mode controller controls 60 the hybrid electric vehicle 1 by setting the drive mode to HEV mode.

Wie oben beschrieben, rückt das Verfahren zur Steuerung des Fahrzeugfahrmodus zur Verbesserung der MHSG-Effizienz, welches bei dem Hybrid-Elektrofahrzeug 1 gemäß der vorliegenden Ausführungsform verwendet wird, die Kupplung 30 nach dem Synchronisieren der Elektromotordrehzahl mit der Verbrennungsmotordrehzahl durch Antreiben des Verbrennungsmotors 10 in dem Zustand ein, in dem die Elektromotordrehzahl des Elektromotors 20 relativ zu dem EV-Modus unter der Übersetzungsverhältnis-Steuerung des stufenlosen Getriebes (CVT) verringert wird, wenn der EV-Modus in den Hybrid-Elektrofahrzeug-Modus (HEV-Modus) durch die Modus-Steuereinrichtung 60 gewechselt wird, während das Hybrid-Elektrofahrzeug 1 in dem Elektrofahrzeug-Modus (EV-Modus) fährt, wodurch nur die Elektromotordrehzahl des Elektromotors 20 in einem Zustand, in dem die Fahrzeuggeschwindigkeit gehalten wird, wie sie ist, verringert wird, um die MHSG-Effizienz des 48V-P2-Systems zu verbessern, und ebenso die für den Moduswechsel von dem EV in den HEV gewünschte Zeit reduziert wird, um eine Verbesserung im Hinblick auf den SOC der Batterie und die Kraftstoffeffizienz zu erzielen.As described above, the method of controlling the vehicle running mode for improving the MHSG efficiency advances, which is in the hybrid electric vehicle 1 according to the present embodiment is used, the clutch 30th after synchronizing the electric motor speed with the internal combustion engine speed by driving the internal combustion engine 10 in the state where the electric motor speed of the electric motor 20th is decreased relative to the EV mode under the speed ratio control of the continuously variable transmission (CVT) when the EV mode is changed to the hybrid electric vehicle mode (HEV mode) by the mode controller 60 is switched while the hybrid electric vehicle 1 runs in the electric vehicle mode (EV mode), thereby reducing only the electric motor speed of the electric motor 20th in a state where the vehicle speed is kept as it is, is decreased to improve the MHSG efficiency of the 48V P2 system, and also the time desired for the mode change from the EV to the HEV is reduced to Achieve an improvement in battery SOC and fuel efficiency.

Claims (16)

Verfahren zur Steuerung eines Fahrzeugfahrmodus eines Fahrzeuges, wobei das Verfahren aufweist: Erfassen eines Moduswechsels, während ein Fahrzeug fährt, durch eine Modus-Steuereinrichtung (60) (S20); Ermitteln, ob der Moduswechsel von einem Elektrofahrzeug-Modus (EV-Modus) in einen Hybrid-Elektrofahrzeug-Modus (HEV-Modus) auftritt, durch die Modus-Steuereinrichtung (60) (S30); und wenn der Moduswechsel ermittelt wird, Durchführen einer Steuerung des Wechsels in einen mit einem stufenlosen Getriebe (CVT) (50) zusammenwirkenden Modus (S40-S90), bei welcher ein Elektromotor (20) des Fahrzeuges mit einem Verbrennungsmotor (10) durch Einrücken einer Kupplung (30) verbunden wird, während das CVT (50) betrieben wird, durch die Modus-Steuereinrichtung (60).A method for controlling a vehicle driving mode of a vehicle, the method comprising: Detecting a mode change while a vehicle is running by a mode controller (60) (S20); Determining whether the mode change from an electric vehicle mode (EV mode) to a hybrid electric vehicle mode (HEV mode) occurs by the mode controller (60) (S30); and when the mode change is detected, performing a control of the change in a continuously variable transmission (CVT) (50) cooperating mode (S40-S90) in which an electric motor (20) of the vehicle has an internal combustion engine (10) by engaging a clutch (30) is connected while the CVT (50) is operated by the mode controller (60). Verfahren nach Anspruch 1, wobei das Verbinden des Elektromotors (20) mit dem Verbrennungsmotor (10) aufweist: Verringern einer Drehzahl (U/min) des Elektromotors (20) durch Betreiben des CVT (50), und Synchronisieren der Drehzahl des Elektromotors (20) mit einer Verbrennungsmotordrehzahl des Verbrennungsmotors (10) (S80).Procedure according to Claim 1 wherein connecting the electric motor (20) to the internal combustion engine (10) comprises: reducing a speed (RPM) of the electric motor (20) by operating the CVT (50), and synchronizing the speed of the electric motor (20) with an internal combustion engine speed of the internal combustion engine (10) (S80). Verfahren nach Anspruch 1 oder 2, wobei beim Betreiben des CVT (50) ein Übersetzungsverhältnis des CVT (50) derart gesteuert wird, dass eine Fahrzeuggeschwindigkeit des Fahrzeuges beibehalten wird (S60).Procedure according to Claim 1 or 2 wherein, when the CVT (50) is operated, a gear ratio of the CVT (50) is controlled so that a vehicle speed of the vehicle is maintained (S60). Verfahren nach einem der Ansprüche 1 bis 3, wobei beim Betreiben des CVT (50) das CVT (50) in einem Endzeitpunkt des EV-Modus startet, wenn der EV-Modus in den HEV-Modus gewechselt wird (S62).Method according to one of the Claims 1 until 3 wherein, in the operation of the CVT (50), the CVT (50) starts at an end timing of the EV mode when the EV mode is changed to the HEV mode (S62). Verfahren nach einem der Ansprüche 1 bis 4, wobei die Steuerung des Wechsels in den mit dem CVT (50) zusammenwirkenden Modus aufweist: Eintreten in den Moduswechsel durch Bestätigen des Wechsels von dem EV-Modus in den HEV-Modus (S50); Durchführen einer Steuerung eines CVT-Übersetzungsverhältnisses durch Betreiben des CVT (50) (S60); Antreiben des Verbrennungsmotors (S70); und Durchführen einer Kupplungseinrückung (S90) durch Steuern der Kupplung (30) (S90).Method according to one of the Claims 1 until 4th wherein the control of switching to the mode cooperating with the CVT (50) comprises: entering the mode switching by confirming the switching from the EV mode to the HEV mode (S50); Performing control of a CVT speed ratio by operating the CVT (50) (S60); Driving the internal combustion engine (S70); and Performing clutch engagement (S90) by controlling the clutch (30) (S90). Verfahren nach Anspruch 5, wobei die Steuerung des CVT-Übersetzungsverhältnisses aufweist: Ausschließen einer Optimalbetriebslinie (OOL) von einem Schaltliniendiagramm bei einer CVT-Steuerung (S61); und Durchführen der CVT-Steuerung.Procedure according to Claim 5 wherein the CVT speed ratio control comprises: excluding an optimal operation line (OOL) from a shift line diagram in CVT control (S61); and performing the CVT control. Verfahren nach Anspruch 6, wobei der Verbrennungsmotor (10) angetrieben wird, wenn die OOL ausgeschlossen ist (S70).Procedure according to Claim 6 wherein the engine (10) is driven when the OOL is excluded (S70). Verfahren nach Anspruch 6 oder 7, wobei das CVT (50) mit einem Schongang (OD) derart betrieben wird, das ein CVT-Übersetzungsverhältnis heraufgeschaltet wird (S62).Procedure according to Claim 6 or 7th wherein the CVT (50) is operated in an overdrive (OD) such that a CVT gear ratio is shifted up (S62). Verfahren nach einem der Ansprüche 5 bis 8, wobei eine Verbrennungsmotordrehzahl erhöht wird, bis die Verbrennungsmotordrehzahl die Drehzahl des Elektromotors (20) erreicht, so dass durch Antreiben des Verbrennungsmotors (10) ein Synchronisationszustand erlangt wird (S80).Method according to one of the Claims 5 until 8th wherein an engine speed is increased until the engine speed reaches the speed of the electric motor (20) so that a synchronization state is achieved by driving the engine (10) (S80). Hybrid-Elektrofahrzeug, aufweisend: eine Modus-Steuereinrichtung (60), die derart konfiguriert ist, dass sie: ermittelt, ob ein Elektrofahrzeug-Modus (EV-Modus) in einen Hybrid-Elektrofahrzeug-Modus (HEV-Modus) geändert ist; wenn der EV-Modus in den HEV-Modus geändert ist, eine Steuerung eines Übersetzungsverhältnisses eines stufenlosen Getriebes (CVT) (50) durchführt, um eine Drehzahl (U/min) eines Elektromotors (20) zu verringern; einen Verbrennungsmotor (10) betreibt, um eine Verbrennungsmotordrehzahl mit der Drehzahl des Elektromotors zu synchronisieren; und eine Kupplung (30) einrückt, nachdem die Verbrennungsmotordrehzahl und die Drehzahl des Elektromotors (20) synchronisiert sind.Hybrid electric vehicle, having: a mode controller (60) configured to: determines whether an electric vehicle mode (EV mode) is changed to a hybrid electric vehicle mode (HEV mode); when the EV mode is changed to the HEV mode, performing control of a gear ratio of a continuously variable transmission (CVT) (50) to decrease a rotational speed (rpm) of an electric motor (20); operating an internal combustion engine (10) to synchronize an internal combustion engine speed with the speed of the electric motor; and a clutch (30) engages after the engine speed and the speed of the electric motor (20) are synchronized. Hybrid-Elektrofahrzeug nach Anspruch 10, wobei die Modus-Steuereinrichtung (60) derart konfiguriert ist, dass sie ein Heraufschalten mit einem Schongang (OD) durchführt, so dass eine Fahrzeuggeschwindigkeit in einem CVT-Übersetzungsverhältnis-Steuerungszustand gehalten ist.Hybrid electric vehicle after Claim 10 wherein the mode controller (60) is configured to perform an overdrive (OD) upshift so that a vehicle speed is maintained in a CVT speed ratio control state. Hybrid-Elektrofahrzeug nach Anspruch 11, wobei das Heraufschalten in einem Endzeitpunkt des EV-Modus gestartet ist.Hybrid electric vehicle after Claim 11 wherein the upshift is started at an end time point of the EV mode. Hybrid-Elektrofahrzeug nach einem der Ansprüche 10 bis 12, wobei die Modus-Steuereinrichtung (60) eine CVT-Steuerung in einem Schaltliniendiagramm einer Optimalbetriebslinie (OOL) nicht durchführt.Hybrid electric vehicle according to one of the Claims 10 until 12th wherein the mode controller (60) does not perform CVT control in a shift line diagram of an optimal operation line (OOL). Hybrid-Elektrofahrzeug nach einem der Ansprüche 10 bis 13, wobei die Kupplung (30) in einem Zustand, in dem die Drehzahl des Elektromotors (20) verringert ist, eingerückt ist.Hybrid electric vehicle according to one of the Claims 10 until 13th wherein the clutch (30) is engaged in a state in which the rotational speed of the electric motor (20) is reduced. Hybrid-Elektrofahrzeug nach einem der Ansprüche 10 bis 14, wobei der Elektromotor (20) zwischen dem Verbrennungsmotor (10) und dem CVT (50) angeordnet ist, um ein 48V-P2-System zu konfigurieren.Hybrid electric vehicle according to one of the Claims 10 until 14th wherein the electric motor (20) is arranged between the internal combustion engine (10) and the CVT (50) to configure a 48V P2 system. Hybrid-Elektrofahrzeug nach Anspruch 15, wobei der Verbrennungsmotor (10) mit einem Mildhybrid-Startergenerator (MHSG) - System verbunden ist, und die Drehzahl des Elektromotors (20) verringert ist, während eine Fahrzeuggeschwindigkeit beibehalten wird.Hybrid electric vehicle after Claim 15 wherein the internal combustion engine (10) is connected to a mild hybrid starter generator (MHSG) system, and the speed of the electric motor (20) is reduced while maintaining a vehicle speed.
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